docs: refactor for clarity

readme.md

@@ -1,40 +1,89 @@
 # Wallpaperctl
-- **Note:** Adjust paths as applicable to the desired OS.
-- **Note:** The "$" represents the terminal prompt.
-- **Note:** Verified to work on Arch Linux with Gnome v3.14 to v42.
 
-## Installation Instructions
+A light weight script to automatically set and rotate through computer desktop wallpaper. Desktop wallpaper rotation
+is based upon a set duration (default, 1 minute). Wallpaper is randomly selected and defaults to look for wallpaper
+from the user's home directory under "Pictures/wallpaper/" (e.g. "/home/adam/Pictures/wallpaper").
 
-1. Download "wallpaperctl.service", "wallpaperctl.timer" and "gnome_rotate_wallpaper".
-2. Move the 3 files to where Systemd user files are stored.
-```bash
-$ mv wallpaperctl.service wallpaperctl.timer /etc/systemd/user/
+- [Installation](#installation)
+  - [Assumptions](#assumptions)
+  - [Dependency Requirements](#dependency-requirements)
+  - [Setup](#setup)
+- [Configuration](#configuration)
+- [Custom Settings](#custom-settings)
+  - [Change Wallpaper Directory](#change-wallpaper-directory)
+  - [Change Wallpaper Duration](#change-wallpaper-duration)
+- [Reference](#reference)
+  - [Available picture-options](#available-picture-options)
+- [External Links](#external-links)
+
+**Note:** Verified to work on Arch Linux with GNOME v3.14 to v42.
+
+## Installation
+
+### Assumptions
+
+- Have experienced working knowledge within a CLI (command-line interface)
+- Understanding of Linux operating system
+- Installed all required dependencies as stated in [Dependency Requirements](#dependency-requirements) section
+- Installation is done via Linux CLI
+- Steps prefixed with a "$" (dollar sign) represents the CLI prompt
+- Steps prefixed with a "#" (number sign) represents the CLI prompt with
+elevated user permissions (e.g. root)
+- The text after the "$" or "#" is to be entered at the CLI
+- The installation instructions are an example of installation and configuration
+
+### Dependency Requirements
+
+- BASH v5+
+- Git v2+
+- GNOME v3.14+
+
+### Setup
+
+1. Clone the project.
+```console
+$ git clone https://gitlab.com/adouglas/wallpaperctl.git
 ```
-3. Move the BASH script "gnome_rotate_wallpaper".
-```bash
-$ mv gnome_rotate_wallpaper /usr/local/bin/
+1. Change to project directory.
+```console
+$ cd wallpaperctl
 ```
-4. Set execute permissions.
-```bash
-$ chmod +x /usr/local/bin/gnome_rotate_wallpaper
+1. Install Systemd unit files.
+```console
+# cp etc/systemd/user/wallpaperctl.* /etc/systemd/user/
 ```
-5. Enable the timer.
-```bash
+1. Install script file.
+```console
+# cp usr/local/bin/wallpaperctl /usr/local/bin/
+```
+1. Reload the systemd configuration.
+```console
+# systemctl daemon-reload
+```
+1. Set execute permission.
+```console
+# chmod +x /usr/local/bin/wallpaperctl
+```
+
+## Configuration
+
+1. Enable the Systemd timer.
+```console
 $ systemctl --user enable wallpaperctl.timer
 ```
-6. Verify the timer is enabled.
-```bash
+1. Verify the timer is enabled.
+```console
 $ systemctl --user list-unit-files
 wallpaperctl.service disabled
 wallpaperctl.timer   enabled
 2 unit files listed.
 ```
-7. Start the timer.
-```bash
+1. Start the Systemd timer.
+```console
 $ systemctl --user start wallpaperctl.timer
 ```
-8. Verify the timer has been started.
-```bash
+1. Verify the timer has been started.
+```console
 $ systemctl --user list-timers
 NEXT                         LEFT    LAST                        PASSED UNIT               ACTIVATES
 Thu 2016-03-10 18:49:00 CST  1s left Thu 2016-03-10 18:48:56 CST 1s ago wallpaperctl.timer wallpaperctl.service
@@ -42,9 +91,11 @@ Thu 2016-03-10 18:49:00 CST  1s left Thu 2016-03-10 18:48:56 CST 1s ago wallpape
 Pass --all to see loaded but inactive timers, too.
 ```
 
-## User Configuration
+## Custom Settings
 
-### Change the default wallpaper directory.
+### Change Wallpaper Directory
+
+This alteration will set the location of where wallpapers are stored.
 
 1. Create the required directories.
 ```bash
@@ -57,25 +108,29 @@ $ nano ~/.config/systemd/user/wallpaperctl.conf
 
     WALLPAPER_DIR=/home/username/Pictures/wallpaper
 
-### Set the Interval to When the Wallpaper Changes.
+### Change Wallpaper Duration
 
-Create the timer file and then change the "OnCalendar" value to the desired interval. Refer to [ArchLinux: systemd/Timers](https://wiki.archlinux.org/index.php/Systemd/Timers#Realtime_timer) for further details.
+This alteration will set the duration of how long the wallpaper is displayed for until a new wallpaper is set.
 
 1. Create the required directories.
-```bash
-$ mkdir  ~/.config/systemd ~/.config/systemd/user
+```console
+$ mkdir  -p ~/.config/systemd/user
 ```
-2. Create the configuration file.
-```bash
+1. Create the configuration file.
+```console
 $ nano ~/.config/systemd/user/wallpaperctl.timer
 ```
+1. Change the OnCalendar value as desired.
+
+    Refer to [ArchLinux: systemd/Timers](https://wiki.archlinux.org/index.php/Systemd/Timers#Realtime_timer) for further
+    details. The below example changes the duration interval from 1 minute to 5 minutes.
 
 ```
 [Unit]
 Description=Wallpaperctl - Systemd GNOME wallpaper changer
 
 [Timer]
-OnCalendar=*:0/1
+OnCalendar=*:0/5
 Persistent=true
 Unit=wallpaperctl.service
 
@@ -83,7 +138,11 @@ Unit=wallpaperctl.service
 WantedBy=wallpaperctl.service
 ```
 
-## Available picture-options
+## Reference
+
+Not applicable at this time. Here for future use.
+
+### Available picture-options
 
 - none
 - wallpaper